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具有宏观裂纹混凝土结构在荷载作用下裂纹是否会进一步扩展，是带裂纹工作的混凝土结构安全性能评价的重要课题。一方面要对混凝土结构应力状态进行现时观测与分析，另一方面要合理评价具有宏观裂纹混凝土结构的起裂特性。根据数批不同形式混凝土试件的试验结果，分析了混凝土起裂荷载／最大荷载、起裂韧度／断裂韧度与试件形式、相对初始缝长的关系，得出了一些有意义的结论。
It is an important issue for the evaluation of the safety performance of concrete structures with cracks that the cracks with a macroscopically cracked concrete structure will be further expanded under load. On the one hand, we should observe and analyze the stress state of concrete structures on the one hand, and on the other hand we should rationally evaluate the initiation behavior of concrete structures with macroscopic cracks. According to the test results of several batches of different types of concrete specimens, the relationship between the initiation load / maximum load, the fracture toughness / fracture toughness of concrete and the specimen form and relative initial seam length is analyzed, and some meaningful conclusions are drawn .